Trapping ions in dense He at 4 K

7 11/2013

Thursday, 07 Nov. 2013, 11:00 - 12:00

Workgroup Arndt Group

Presenter: Prof. Dr. Dieter Gerlich, Technische Universität, Chemnitz
Host: Prof. Markus Arndt
Where: Josef-Stefan-HS, 3rd Floor, Strudlhofgasse 4, 1090 Vienna

Ion guiding and trapping in inhomogeneous rf fields [1] is used in many instruments for studying the structure of molecular ions, collision processes of ions (bimolecular reactions, radiative association, growth of clusters), and the physics and chemistry of charged nanoparticles. In the introduction of my talk, I give a personal "short" (44 years) review of this versatile technique.

In the results section, I present results measured in the last two years in cooperation with groups in Basel, Prag, and Köln. As the title emphasizes, Helium number densities up to 1016 cm–3 and temperatures down to 3 K open up new possibilities in ion spectroscopy and collision dynamics.

[1]   D. Gerlich, Inhomogeneous Electrical Radio Frequency Fields: A Versatile Tool for the Study of

Processes with Slow Ions. Adv. in Chem. Phys. LXXXII (1992) 1. For more references see